A tremendous value in a rifle scope with parallax adjustment down to 5 yards. Great for shooting in your backyard or basement. Need to take down some squirrels raiding your bird feeders? This will home in on your close targets! While this is billed as full-size scope, it's under 12" and under a pound and won't add a lot of weight to your gun. Fits air rifles and rimfire guns with 3/8 or 11mm rails or dovetails. To mount this scope on a centerfire gun, get some Weaver rings.